本子
běn zi · HSK 1
book
📓 本 (root/book) + 子 (noun suffix) = notebook
本 originally showed a tree 木 with a mark at its base, meaning root or origin; it later came to mean book or volume. 子 is a common noun-forming suffix, so 本子 lands on book or notebook.
本 — tree 木 + mark at base
本 is a pictograph of a tree (木) with a stroke at its base, marking the roots. From this 'root' meaning it extended to 'origin,' 'source,' and 'foundation.' In modern usage it also serves as a measure word for bound objects like books.
子 — pictograph of a baby/child with arms out
子 began as a pictograph of a swaddled infant with a large head and outstretched arms, originally meaning 'baby' or 'child.' From there it broadened to 'son,' 'offspring,' and a respectful suffix for masters like 孔子 (Confucius). It also became one of the twelve earthly branches.